"Fatigued drivers are a safety risk on our roadways," CHP Commissioner Joe Farrow said. "If you are tired, reaction time and judgment can become impaired. Tired drivers behave similarly to those who are intoxicated."

According to statistics from the CHP's Statewide Integrated Traffic Records System, there were more than 3,600 collisions involving drowsy drivers in 2010, the most recent year in which finalized figures are available. More than 2,000 people were injured and 32 people died from those collisions.

Drowsiness can reduce reaction time, impact a driver's attention and impair judgment and vision.

The CHP and NSF offer the following tips to drivers to reduce the risk of falling asleep behind the wheel.

Get enough sleep, at least seven to nine hours, to help maintain alertness. On long road trips, schedule breaks every couple of hours or every 100 miles.

When possible, travel with a companion who can take a turn behind the wheel or help keep the driver awake. Avoid driving at times when you would normally be asleep.

Avoid alcohol or medications that cause drowsiness. Consume caffeine because it increases alertness.

When tiredness sets in, exit the highway and find a safe location to park and rest.

"With a few simple precautions, drivers can help prevent future tragedies form occurring," Farrow said.